As we grow older, time spent on devices often replaces time spent engaging in physical activity or socially with other people, and it can even become a substitute for emotional regulation, which is detrimental to physical, social, and emotional development.
This phenomenon is very common in our contemporary society. In China, a lot of younger age students spend the majority of their time on completing homework or activities through digital devices. The outcome is that these kids become less engaged in physical and social activities with their peers or others. Therefore, a lot of them are not even capable of communicating with people and they cannot express their thoughts because of the lack of socialization.